Supplemental mattress



FIG. 1 is a perspective view of my supplemental mattress design, being of "queen" size;

FIG. 2 is a top plan view of the design shown in FIG. 1;

FIG. 3 is a side elevational view of the design shown in FIG. 1, the other side being a mirror image thereof;

FIG. 4 is a bottom plan view of the design shown in FIG. 1;

FIG. 5 is a front elevational view of the design shown in FIG. 1, the rear elevational view being a mirror image thereof;

FIG. 6 is a top plan view of an alternate embodiment of my design, differing from the first embodiment only in proportion, and being of "twin" size;

FIG. 7 is a side elevational view of the embodiment of my invention shown in FIG. 6, the other side being a mirror image thereof;

FIG. 8 is front elevational view of the embodiment of my invention shown in FIG. 6, the rear elevational view being a mirror image thereof;

FIG. 9 is a top plan view of another embodiment of my design, differing from the first embodiment only in proportion, and being of "full" size;

FIG. 10 is a side elevational view of the embodiment of my invention shown in FIG. 9, the other side being a mirror image thereof;

FIG. 11 is front elevational view of the embodiment of my invention shown in FIG. 9, the rear elevational view being a mirror image thereof;

FIG. 12 is a top plan view of yet another embodiment of my design, differing from the first embodiment only in proportion, and being of "king" size;

FIG. 13 is a side elevational view of the embodiment of my invention shown in FIG. 12, the other side being a mirror image thereof; and,

FIG. 14 is front elevational view of the embodiment of my invention shown in FIG. 12, the rear elevational view being a mirror image thereof. 

The ornamental design for a supplemental mattress, as shown and described. 